Posted by **Kenya** on Thursday, February 19, 2009 at 9:15pm.

In January, gasoline cost $1.05 per gallon. In July, gasoline cost $1.20 per gallon. Find the percent of increase.

Would the answer for this question be 14.3?

And how do you do percent of decrease?

_______________________________________

The original cost of a computer is $900. If the price is decreased by 15%, what is the sale price?

I need help with this question(:

Thank you

- Adv. Math -
**bobpursley**, Thursday, February 19, 2009 at 9:18pm
percent (increase or decrease) is

Percent= (final-initial)/initial * 100

fifteen percent of 900 is 130 dollars.

so the cost is 900-130 dollars

price=(100-percentdecrease)/100 * 900

- Adv. Math -
**Chopsticks**, Thursday, February 19, 2009 at 9:20pm
bob, this looks kind of like exponential growth and exponential decay, is it? I was just wondering since we just started on exponential decay today.

## Answer this Question

## Related Questions

- Adv. Math - Can someone else explain it but more easier for an 8th grader ...
- math - on january 1,1999,the price of gasoline was$1.39 per gallon .if the ...
- statistics - In 1995, the cost of unleaded gasoline was $.95 per gallon. In 2010...
- Math - How much would it cost to drive an automobile that averages 22 miles per ...
- math - A saleman operates a car which averged 15 miles to a gallon of gasoline....
- Math - If the price of gasoline in Germany is about $1 per liter, what is the ...
- math - A student uses approximately 40 to 45 gallons of gasoline per month. The ...
- math - An employee at a marketing firm A student uses approximately 40 to 45 ...
- math - How much would it cost to drive 54.2 miles in a car that gets 16 miles ...
- Managerial Economics - The coefficient of the price of gasoline in the ...

More Related Questions